/**
* GetBookmark.js
*
* Released under LGPL License.
* Copyright (c) 1999-2017 Ephox Corp. All rights reserved
*
* License: http://www.tinymce.com/license
* Contributing: http://www.tinymce.com/contributing
*/
define(
'tinymce.core.dom.GetBookmark',
[
'ephox.katamari.api.Fun',
'tinymce.core.caret.CaretBookmark',
'tinymce.core.caret.CaretContainer',
'tinymce.core.caret.CaretPosition',
'tinymce.core.dom.NodeType',
'tinymce.core.selection.RangeNodes',
'tinymce.core.text.Zwsp',
'tinymce.core.util.Tools'
],
function (Fun, CaretBookmark, CaretContainer, CaretPosition, NodeType, RangeNodes, Zwsp, Tools) {
var isContentEditableFalse = NodeType.isContentEditableFalse;
var getNormalizedTextOffset = function (trim, container, offset) {
var node, trimmedOffset;
trimmedOffset = trim(container.data.slice(0, offset)).length;
for (node = container.previousSibling; node && NodeType.isText(node); node = node.previousSibling) {
trimmedOffset += trim(node.data).length;
}
return trimmedOffset;
};
var getPoint = function (dom, trim, normalized, rng, start) {
var container = rng[start ? 'startContainer' : 'endContainer'];
var offset = rng[start ? 'startOffset' : 'endOffset'], point = [], childNodes, after = 0;
var root = dom.getRoot();
if (NodeType.isText(container)) {
point.push(normalized ? getNormalizedTextOffset(trim, container, offset) : offset);
} else {
childNodes = container.childNodes;
if (offset >= childNodes.length && childNodes.length) {
after = 1;
offset = Math.max(0, childNodes.length - 1);
}
point.push(dom.nodeIndex(childNodes[offset], normalized) + after);
}
for (; container && container !== root; container = container.parentNode) {
point.push(dom.nodeIndex(container, normalized));
}
return point;
};
var getLocation = function (trim, selection, normalized, rng) {
var dom = selection.dom, bookmark = {};
bookmark.start = getPoint(dom, trim, normalized, rng, true);
if (!selection.isCollapsed()) {
bookmark.end = getPoint(dom, trim, normalized, rng, false);
}
return bookmark;
};
var trimEmptyTextNode = function (node) {
if (NodeType.isText(node) && node.data.length === 0) {
node.parentNode.removeChild(node);
}
};
var findIndex = function (dom, name, element) {
var count = 0;
Tools.each(dom.select(name), function (node) {
if (node.getAttribute('data-mce-bogus') === 'all') {
return;
}
if (node === element) {
return false;
}
count++;
});
return count;
};
var moveEndPoint = function (rng, start) {
var container, offset, childNodes, prefix = start ? 'start' : 'end';
container = rng[prefix + 'Container'];
offset = rng[prefix + 'Offset'];
if (NodeType.isElement(container) && container.nodeName === 'TR') {
childNodes = container.childNodes;
container = childNodes[Math.min(start ? offset : offset - 1, childNodes.length - 1)];
if (container) {
offset = start ? 0 : container.childNodes.length;
rng['set' + (start ? 'Start' : 'End')](container, offset);
}
}
};
var normalizeTableCellSelection = function (rng) {
moveEndPoint(rng, true);
moveEndPoint(rng, false);
return rng;
};
var findSibling = function (node, offset) {
var sibling;
if (NodeType.isElement(node)) {
node = RangeNodes.getNode(node, offset);
if (isContentEditableFalse(node)) {
return node;
}
}
if (CaretContainer.isCaretContainer(node)) {
if (NodeType.isText(node) && CaretContainer.isCaretContainerBlock(node)) {
node = node.parentNode;
}
sibling = node.previousSibling;
if (isContentEditableFalse(sibling)) {
return sibling;
}
sibling = node.nextSibling;
if (isContentEditableFalse(sibling)) {
return sibling;
}
}
};
var findAdjacentContentEditableFalseElm = function (rng) {
return findSibling(rng.startContainer, rng.startOffset) || findSibling(rng.endContainer, rng.endOffset);
};
var getOffsetBookmark = function (trim, normalized, selection) {
var element = selection.getNode();
var name = element ? element.nodeName : null;
var rng = selection.getRng();
if (isContentEditableFalse(element) || name === 'IMG') {
return { name: name, index: findIndex(selection.dom, name, element) };
}
element = findAdjacentContentEditableFalseElm(rng);
if (element) {
name = element.tagName;
return { name: name, index: findIndex(selection.dom, name, element) };
}
return getLocation(trim, selection, normalized, rng);
};
var getCaretBookmark = function (selection) {
var rng = selection.getRng();
return {
start: CaretBookmark.create(selection.dom.getRoot(), CaretPosition.fromRangeStart(rng)),
end: CaretBookmark.create(selection.dom.getRoot(), CaretPosition.fromRangeEnd(rng))
};
};
var getRangeBookmark = function (selection) {
return { rng: selection.getRng() };
};
var getPersistentBookmark = function (selection) {
var dom = selection.dom;
var rng = selection.getRng();
var id = dom.uniqueId();
var collapsed = selection.isCollapsed();
var styles = 'overflow:hidden;line-height:0px';
var element = selection.getNode();
var name = element.nodeName;
var chr = '';
if (name === 'IMG') {
return { name: name, index: findIndex(dom, name, element) };
}
// W3C method
var rng2 = normalizeTableCellSelection(rng.cloneRange());
// Insert end marker
if (!collapsed) {
rng2.collapse(false);
var endBookmarkNode = dom.create('span', { 'data-mce-type': 'bookmark', id: id + '_end', style: styles }, chr);
rng2.insertNode(endBookmarkNode);
trimEmptyTextNode(endBookmarkNode.nextSibling);
}
rng = normalizeTableCellSelection(rng);
rng.collapse(true);
var startBookmarkNode = dom.create('span', { 'data-mce-type': 'bookmark', id: id + '_start', style: styles }, chr);
rng.insertNode(startBookmarkNode);
trimEmptyTextNode(startBookmarkNode.previousSibling);
selection.moveToBookmark({ id: id, keep: 1 });
return { id: id };
};
var getBookmark = function (selection, type, normalized) {
if (type === 2) {
return getOffsetBookmark(Zwsp.trim, normalized, selection);
} else if (type === 3) {
return getCaretBookmark(selection);
} else if (type) {
return getRangeBookmark(selection);
} else {
return getPersistentBookmark(selection);
}
};
return {
getBookmark: getBookmark,
getUndoBookmark: Fun.curry(getOffsetBookmark, Fun.identity, true)
};
}
);
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